Same thing here... Using it for just family and friends no matter the computer, I have been marked as Commercial Usage which make that the connections only last 5 minutes...
I have just texted to the following link to turn my account clean again: https://www.teamviewer.com/en/support/personal-use-verification/?_ga=2.12725431.1271782355.1529930328-345914583.1529930328&_gac=1.208979622.1529951669.EAIaIQobChMImMHJibrv2wIVRRbTCh1WMwIEEAAYASAAEgJ7CvD_BwE
Hope I get answered soon...
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